Abstract
In order to study the control capability of curved blade for turbine blade unsteady forces, numerical simulations on the unsteady flow in two stages of a HP turbine were performed. The change of the unsteady blade forces and pressure were investigated when the stator of the first stage used the positive bowed blade. The results show when the bowed blade is used, it can suppress the unsteady pulsing of the forces acting on the turbine cascades by changing radial pressure gradient and vorticity distribution in the outlet of stator. But it is a locally beneficial effect for the unsteady pressure, and a clear beneficial effect for the mid-section of the blade. Regarding it as a whole, the positive bowed blade decreases the pulsing of the pressure in the unsteady flow field remarkably.
| Original language | English |
|---|---|
| Pages (from-to) | 760-767 |
| Number of pages | 8 |
| Journal | Tuijin Jishu/Journal of Propulsion Technology |
| Volume | 34 |
| Issue number | 6 |
| State | Published - Jun 2013 |
Keywords
- Blade force
- HP turbine
- Positive bowed blade
- Surface pressure
- Unsteadiness
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